U.S. Route 2 (New Hampshire)

U.S. Route 2
US 2 highlighted in red
Route information
Length:	2,571 mi (4,138 km)
Existed:	November 11, 1926 – present
Western segment
Length:	2,112 mi (3,399 km)
West end:	I‑5 in Everett, WA
Major junctions:	I‑90 / US 395 in Spokane, WA I‑15 in Shelby, MT US 87 near Havre, MT US 83 in Minot, ND I‑29 / US 81 in Grand Forks, ND US 71 in Bemidji, MN I‑35 in Duluth, MN US 53 from Amnicon, WI to Superior, WI US 51 in Hurley, WI
East end:	I‑75 in St. Ignace, MI
Eastern segment
Length:	460 mi (740 km)
West end:	US 11 in Rouses Point, NY
Major junctions:	I‑89 / US 7 in Burlington, VT I‑91 / US 5 in St. Johnsbury, VT US 3 in Lancaster, NH US 1 in Houlton, ME
East end:	I‑95 in Houlton, ME
Location
States:	Washington, Idaho, Montana, North Dakota, Minnesota, Wisconsin, Michigan, New York, Vermont, New Hampshire, Maine
Highway system
United States Numbered Highway System List Special Divided Replaced

U.S. Route 2 or U.S. Highway 2 (US 2) is an east–west U.S. Highway spanning 2,571 miles (4,138 km) across the northern continental United States. US 2 consists of two segments connected by various roadways in southern Canada. Unlike some routes, which are disconnected into segments because of encroaching Interstate Highways, the two portions of US 2 were designed to be separate in the original 1926 highway plan.

The western segment of US 2 has its western terminus at an interchange with Interstate 5 (I-5) and State Route 529 (Maple Street) in Everett, Washington, and its eastern terminus at I-75 in St. Ignace, Michigan. The eastern segment of US 2 has its western terminus at US 11 in Rouses Point, New York and its eastern terminus at I-95 in Houlton, Maine.

As its number indicates, it is the northernmost east–west U.S. Route in the country. It is the lowest primary-numbered east–west U.S. Route, whose numbers otherwise end in zero, and was so numbered to avoid a US 0. Sections of US 2 in New England were once New England Route 15, part of the New England road marking system.

The western segment of US 2 extends from the Upper Peninsula of Michigan across the northern tier of the lower 48 states. Most of the western route was built roughly paralleling the Great Northern Railway. US 2 adopted the railway's route nickname "The Highline" as the most northern crossing in the U.S.